Convert art-libartd-libopenjdkd-host-dependency to Android.bp

The check `ifneq ($(HOST_OS),darwin)` in this Android.mk
can be ignored because Android no longer supports building on macOS
after June 22, 2021 (Android 11).

Use `phony_rule` instead of `phony` because `libopenjdkd` has a
visibility of `//art/build/apex`. Additionally, libopenjdkd's
dependencies have various visibility settings, changing its visibility
directly to `//art` would cause errors.
Furthermore, `art-libartd-libopenjdkd-host-dependency` is essentially a
phony target, existing solely for `mm/mmm/mmma` commands. Changing it
to `phony_rule` aligns with the original design intent.

Bug: 347142939
Test: 1) m -j art-libartd-libopenjdkd-host-dependency
      2) ART_BUILD_HOST_DEBUG=false m -j art-libartd-libopenjdkd-host-dependency
      3) cd art && mm/mmm/mmma, then, check `libopenjdkd` be built.
Change-Id: Idd55667a0bd803d4124fbf0ea4c3bf45e2230aad

Author: Nelson Li

Android.bp

@@ -40,3 +40,23 @@ phony {
         ],
     }),
 }
+
+// Fake packages to ensure generation of libopenjdkd when one builds with mm/mmm/mmma.
+//
+// The library is required for starting a runtime in debug mode, but libartd does not depend on it
+// (dependency cycle otherwise).
+//
+// Note: * As the package is phony to create a dependency the package name is irrelevant.
+//       * We make MULTILIB explicit to "both," just to state here that we want both libraries on
+//         64-bit systems, even if it is the default.
+phony_rule {
+    name: "art-libartd-libopenjdkd-host-dependency",
+    phony_deps: [
+        "libopenjdkd",
+    ],
+    compile_multilib: "both",
+    enabled: select(soong_config_variable("art_module", "art_build_host_debug"), {
+        false: false,
+        default: true,
+    }),
+}

Android.mk

@@ -247,31 +247,6 @@ endif
 # "include $(BUILD_...)".
 LOCAL_PATH := $(art_path)
 
-####################################################################################################
-# Fake packages to ensure generation of libopenjdkd when one builds with mm/mmm/mmma.
-#
-# The library is required for starting a runtime in debug mode, but libartd does not depend on it
-# (dependency cycle otherwise).
-#
-# Note: * As the package is phony to create a dependency the package name is irrelevant.
-#       * We make MULTILIB explicit to "both," just to state here that we want both libraries on
-#         64-bit systems, even if it is the default.
-
-# ART on the host.
-ifneq ($(HOST_OS),darwin)
-ifeq ($(ART_BUILD_HOST_DEBUG),true)
-include $(CLEAR_VARS)
-LOCAL_MODULE := art-libartd-libopenjdkd-host-dependency
-LOCAL_LICENSE_KINDS := SPDX-license-identifier-Apache-2.0
-LOCAL_LICENSE_CONDITIONS := notice
-LOCAL_NOTICE_FILE := $(LOCAL_PATH)/NOTICE
-LOCAL_MULTILIB := both
-LOCAL_REQUIRED_MODULES := libopenjdkd
-LOCAL_IS_HOST_MODULE := true
-include $(BUILD_PHONY_PACKAGE)
-endif
-endif # HOST_OS != darwin
-
 ########################################################################
 # "m build-art" for quick minimal build
 .PHONY: build-art